Reducing-valve



.No. 608,345. Patented Aug. 2, |898.

C. E. RETTEW &. W. R. JOHNSON.

REDUCING VALVE.

(Application led July 7, 1897.)

(No Model.)

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UNITE-D v- STATES PATENT Enron.

CHARLES E. RETTEV AND WILLIAM R. .ICHNSON, OF CARBONDALE7 PENNSYLVANIA.

REDUCINGf-VALVE.

SPECIFICATION forming part of Letters-Patent No. 608,345, dated August 2, 1898.

v Application filed July 7, 1897. Serial No. 643,783. (No model.)

provide a simple, cheap, and durable valvek for reducing the pressure of a iiuid agent to a set pressure of any desired degree.

. A further Objectis to reduce the pressure" automatically and without excessive shock or jar which would tend to injuriously affect connected pipes, &c. t

In carrying out our invention we employ a valve having inlet and outlet orifices vand a valve and valve-seat, said valve being operable by means of a valve-stem, to Whichis connected a piston. The piston-chamber and the space about the valve are connected by means of a port extending through the valvestem, whereby excess pressure at the latter point is communicated to the piston-chamber, where it operates to close the valve.

The invention is illustrated in the accompanying drawing, which is a vertical section, partly in elevation, of a valve mechanism embodying our improvements.

' Referring to the drawing, A designates the Valve-chamber, having inlet-orifice a and outlet-orifice a. The latter maybe of any desired construction to facilitate connection of pipes. They may be provided with outwardly-extending perforate iianges, as shown in the drawing, or with internal or external screw-threads. This valve-chamber may be of any desired size and the casing formed of any suitable material.

The valve-chamber A is interiorly divided by the partition B, here shown as angular in form and provided With the valve-seat b.

C designates the piston-chamber. This is cylindrical in form and is provided with a flat outwardly extending base c,- by means of which it may besecured to the valve-chamber a. In the present instance we have shown the upper portion of the valve-chamber A as provided with a horizontal flange or annulus a2, the base c of the piston-chamber being connected to such iiange or annulus a2 by means of bolts and nuts c c2. Between the meeting surfaces ofthev parts d2 and c we preferably place an elastic washer c3. lf desired, however, the securing mechanism described may be dispensed with, the valve-chamber being provided with screw-threads adapted to engage 4with corresponding threads upon the base c of the piston-chamber C. D designates a piston having vertical movement in the piston-chamber C. This piston is here shown as consisting of va preferably metallic disk d, a washer or bushing d' of leather, rubber, or

other suitable material, and a disk or disks d2 above said washer or bushing.

Secured, preferably by means of nuts e, to the piston D is the valve-stem E. This passes through a perforation e', extending from the piston-chamber C into the upper portion A of the valve-chamber A.

ezdesignates a packing-box, here show-n as provided with external screw-threads engaging with corresponding threads in an annular recess formed in the casing of the valvechamber and communicating with the chamber C, but which may be of any desired construction. Its purpose is to prevent the ingress of water or other fluid agentlfrom the valve-chamber to the piston-chamber outside of the valve-stem E.

The valve-stem E is tubular in form, being providedl with a central perforation e3, one end of which communicates with the interior of the piston-chamber C above the piston D, and the other end by means of a transverse port e4 with the upper portion A of the valvechamber A.

Secured to the lower end of the valve-stem E and coacting with the valve-seat h, formed in the vpartition B, is the 'valve F. In the present instance this valve is shown as consisting of a circular body the under surface of which is beveled or curved in correspondence with the curvature of the valve-seat h. Below such curved portion the valve is provided with wings or'vanes fat right angles to each other, the purpose of which is to center the valve in the valve-seat and maintain it in this position against accidental displacement. Such wings or vanes do not of course AIoo obstruct the passage of the l'luid agent from the lower to the upper portions of the valvechamber when the valve is opened.

As to the means for securing the valvestem E to the valve F, these are herein shown as consisting 01"; a llange f', formed at the lower end of the valve-stem and received in a suitable circular recess in the top of said valve. Surrounding the lower end of the valve-stem and above the [lange f is a collarnu tj, the exterior of which is screw-threaded, and this portion engages with the correspondingly-threaded interior of the recess which receives the lower end of the valve-stein.

cl designates an annular projection formed on the under side of the base c of the pistonehamber, the purpose of which is to limit the upward movement of the valve F.

rFhe operation of our improved valve is as follows: Assuming that the duid agent elnployed is water, this enters at high pressure by the inlet-orifice u, passes through the perforation in the partition l), and thence out through the outlet-orifice a. To reduce this pressure, the valve F is operated to prevent this circulation of the water, and this is done in the following manner: Assuming thatit is desired to reduce the pressure at the outletorillce, a portion otl the water passing through the valve will be forced through the port c'I and passage c to the piston-chamber C above the piston D. \Yhen the passage of the water through the outlet connection is cut ol'f, the pressure above the piston D becomes su llieicntly great to move said piston downwardly, and thereby, through the connections above described, close the valve F, whereby the pressure ot the water escaping through said outlet-orifice a aud its connection will be reduced to the desired extent. Of course the degree of reduction ot' the pressure depends wholly upon the dimensions ol". the valve-chamber C, and, il desired, these may be varied to any desired extent.

lVe have found it desirable in practice to provide the easing ol the valve-chamber C below the piston D with an exhaust-port e for the escape of any water or other agent tinding its way into the valve-chamber below the piston D.

Vhat we claim, and desire to secure by Letters Patent, is-

1. In a reducing-valve, the combination with avalve-ehamber having inlet and outlet oritices and a valve-seat in said chamber between said oritices, of a cylinder removably secured to said valve-casin g, a piston in said cylinder, a valve of smaller area than the piston, connected to said piston and engaging the valve-seat, the pressure on the inlet side tending to normally unseat the said valve, the valve-stein having a contracted passage through the same connecting the outlet side of the valve-chamber and the interiorot said cylinder above the piston, whereby the pressure on the outlet side tends to seat the valve, substantially as set forth.

2. In a reducing-valve, the combination with a valve-chamber having inlet and outlet orifices and avalve-seat between said orilices, ot a cylinder removably secured to said valvechamber, a piston in said cylinder, a valvesteln connected to said pistou, a valve counected to said valve-stem and engaging said valve-seat, the valve-stem having a passageway cl therein extending from the outlet side of the valve-chamber to the interior of said cylinder above the piston, and stops c tor limiting the upward movement ol' the valve, substantially as set forth.

This specification signed and witnessed this 5th day of July, 1897.

CHARLES E. RlC'l'llbHV. l \VILLIAM lt. JOHNSON.

lVitnesses:

Ilannv bnmrr, F. C. 'lmMoNs 

